Infiniti Q45. Manual - part 646

TROUBLE DIAGNOSES WORK FLOW

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DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN 
FOR RAS CONTROL UNIT

Display Results (Present)

●

OK: Normal

●

UNKWN: The diagnosed unit does not transmit or receive the applicable data normally.

●

–: There is no received unit or the unit is not in the condition that reception diagnosis is performed.

Display Results (Past)

●

OK: Normal

●

0: There is malfunction now.

●

1 – 39: Displays when it is normal at present and finds malfunction in the past. It increases like 0

→

1

→

2...38

→

39 after returning to the

normal condition whenever IGN OFF

→

ON. If it is over 39, it is fixed to 39 until the self-diagnostic results are erased. It returns to 0

when malfunction is detected again in the process.

●

–: Undiagnosed

PKIB9803E

“SELECT SYSTEM” 

screen

“CAN DIAG SUP-

PORT MNTR” 

screen

Description

Present

Past

RAS/HICAS

TRANSMIT DIAG

Make sure of normal transmission.

OK/UNKWN/–

OK/0/1 – 39/–

ECM

Make sure of normal reception from ECM.

OK/UNKWN/–

VDC/TCS/ABS

Make sure of normal reception from VDC/TCS/ABS 
control unit.

OK/UNKWN/–

STRG

Make sure of normal reception from steering angle 
sensor.

OK/UNKWN/–

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TROUBLE DIAGNOSES WORK FLOW

DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN 
FOR LDW CAMERA UNIT

Display Results (Present)

●

OK: Normal

●

UNKWN: The diagnosed unit does not transmit or receive the applicable data normally.

●

–: There is no received unit or the unit is not in the condition that reception diagnosis is performed.

Display Results (Past)

●

OK: Normal

●

0: There is malfunction now.

●

1 – 39: Displays when it is normal at present and finds malfunction in the past. It increases like 0

→

1

→

2...38

→

39 after returning to the

normal condition whenever IGN OFF

→

ON. If it is over 39, it is fixed to 39 until the self-diagnostic results are erased. It returns to 0

when malfunction is detected again in the process.

●

–: Undiagnosed

PKIC5951E

“SELECT SYSTEM” 

screen

“CAN DIAG SUPPORT 

MNTR” screen

Description

Present

Past

LDW

TRANSMIT DIAG

TRANSMIT DIAG is not diagnosed.

–

OK/0/1 – 39/–

ECM

Make sure of normal reception from ECM.

OK/UNKWN/–

VDC/TCS/ABS

Make sure of normal reception from VDC/TCS/
ABS control unit.

OK/UNKWN/–

ICC

Make sure of normal reception from ICC unit. 

OK/UNKWN/–

TCM

Make sure of normal reception from TCM. 

OK/UNKWN/–

CAN COMMUNICATION

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CAN COMMUNICATION

PFP:23710

System Description

NKS001GP

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

Component Parts and Harness Connector Location

NKS002DL

1.

ICC unit B243 (with ICC system)

2.

Pre-crash seat belt control unit B318 3.

ECM F101

4.

VDC/TCS/ABS control unit E218

5.

ICC sensor E52 (with ICC system)

6.

Data link connector M31

7.

Combination meter M41

8.

Steering angle sensor M52

9.

LDW camera unit R26 (with lane 
departure warning system)

10. A/T assembly F26

11.

RAS control unit B39 (with rear 
active steer)

SKIB6961E

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CAN COMMUNICATION

Schematic

NKS002DM

TKWM3783E